bug#4136: 23.1; delete-pair

[Juri Linkov]

>>> I don't use delete-pair myself regularly, but giving it some testing
>>> now, this new version seems to work fine.
>>>
>>> Any comments?  (The patch is 11 years old.)
>>
>> I don't know, I use the current version of delete-pair many times every day,
>> and happy with it.  If the patch doesn't break the current behavior, that
>> would be fine.
>
> Could you test the patch and see whether there's any problems?  :-)

Now I tested that at least it doesn't cause regression.
Hopefully, its new features work equally well :-)